IM-S24-15 CH Issue 4
5
LE valves
Group 1 Group 2 Group 1 Group 2
Product
Gases Gases Liquids Liquids
LE31 PN16 DN15 - DN50 - SEP - SEP
LE31B1 PN16 DN15 - DN50 - SEP - SEP
LE33 PN16
DN15 - DN50 - SEP - SEP
DN65 - DN100 - 1 - SEP
LE33B1 PN16
DN15 - DN50 - SEP - SEP
DN65 - DN100 - 1 - SEP
1.2 Access
Ensure safe access and if necessary a safe working platform (suitably guarded)
before attempting to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
1.4 Hazardous liquids or gases in the pipeline
Consider what is in the pipeline or what may have been in the pipeline at some
previous time. Consider: flammable materials, substances hazardous to health,
extremes of temperature.
1.5 Hazardous environment around the product
Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases,
extremes of temperature, hot surfaces, fire hazard (e.g. during welding), excessive
noise, moving machinery.
1.6 The system
Consider the effect on the complete system of the work proposed. Will any proposed
action (e.g. closing isolation valves, electrical isolation) put any other part of the
system or any personnel at risk?
Dangers might include isolation of vents or protective devices or the rendering
ineffective of controls or alarms. Ensure isolation valves are turned on and off in a
gradual way to avoid system shocks.
1.7 Pressure systems
Ensure that any pressure is isolated and safely vented to atmospheric pressure.
Consider double isolation (double block and bleed) and the locking or labelling of
closed valves. Do not assume that the system has depressurised even when the
pressure gauge indicates zero.
Group 1 Group 2 Group 1 Group 2
Product
Gases Gases Liquids Liquids
LEA31 ANSI 125 DN15 - DN50 - SEP - SEP
LEA33 ANSI 125
DN25 - DN65 - SEP - SEP
DN80 - DN100 - 1 - SEP
LEA valves
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